Machining / Grinding Infrared Transmitting Glass

CiDRA® Precision Services, LLC has years of experience manufacturing micron level tolerance products from Infrared Transmitting Glass. We leverage our in-depth dicing, drilling, milling, grinding, and polishing capability to manufacture the highest quality Infrared Transmitting Glass products. For those applications with exacting optical requirements, CiDRA® Precision Services, LLC has the ability to clean, polish, and apply coatings.

Whether you need prototypes or volumne production, CiDRA® Precision Services, LLC is here to help. Please contact us to discuss your applications.

About Infrared Transmitting Glass

There are several viable infrared transmitting glass, crystalline and other materials, depending on the wavelength range of interest.  Germanium Oxide and Chalcogenide Glasses are two prominent examples of infrared transmitting glasses.  Germanium Oxide is transmissive in the visible and near infrared region (300nm to 5.0um). Chalcogenide glass, which is any glass containing a substantial percentage of one or more of sulfur, selenium or tellurium (the elements in the Chalcogenide element group), is transmissive in the far infrared range (4.0um to 14.0um).

Infrared Transmitting Glass Applications

  • Weapons sights
  • Infrared vision system optics
  • Infrared spectroscopy windows

Infrared Transmitting Glass Properties

 

Units

Infrared Transmitting Glass (Chalcogenide)

Infrared Transmitting Glass (Germanium Oxide)
Softening Point C
Annealing Point C
Strain Point C
Max Use Temperature C 440 - 523
Thermal Conductivity W/(m K) 0.17 - 0.28 0.006
Specific Heat J/(kg C) 360 400 - 460
Coefficient of Thermal Expansion 1/C
(x10^-6)		 17.0 9.0
Moh Hardness
Knoop Hardness kg/mm^2 442
Density g/cm^3 4.4 4.8
Compressive Strength MPa 161
Tensile Strength MPa
Bending Strength MPa 17.2 - 23 79.2
Young's Modulus GPa 18 63.4
Poisson's ratio 0.28 0.3
Dielectric Strength kv/cm
Dielectric Constant (@1MHz)
Dielectric Loss Tangent
Resistivity ohm/cm
Usable Transmission Range um 3 - 14
Refractive Index (@550nm) 1.5 - 2.7 1.7 to 1.8
The information provided in this table is for room temperature only, and is a compilation of publicly available data.  This information is provided for comparison purposes only, and is not intended to be warrantable.   Further, CiDRA® Precision Services, LLC disclaims any and all liability from errors, inaccuracies, or omissions.

 

Please contact us if you would like to discuss your Infrared Transmitting Glass dicing, drilling, milling, grinding, polishing or any other machining applications.